Hd650 on fiio ka3?

The 650 is a 300 ohms headphone,and my fiio ka3 can power up to 240mw@32ohms on balanced output

It is a pretty high jump since I got the sennheiser for absolute bargain around ~$100

I don't have a high end Dac amp,but I do have a fiio ka3 which can power up most of my iem

Do you think I should spend more for a high end Dac amp? will the difference be that significant compared to my current fiio ka3?